[MacPorts] #52516: sundials @2.6.2_1: update to 2.7.0, add +fcmix

[MacPorts]

#52516: sundials @2.6.2_1: update to 2.7.0, add +fcmix
------------------------+------------------------
  Reporter:  jjstickel  |      Owner:  seanfarley
      Type:  update     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:  haspatch
      Port:  sundials   |
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Comment (by seanfarley):

 Just need to test it with PETSc. I usually use this example to verify it
 worked:

 {{{
 $ cd petsc/src/ts/examples/tutorials
 $ make ex3
 $ ./ex3 -ts_type sundials
 }}}

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Ticket URL: <https://trac.macports.org/ticket/52516#comment:3>
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